Deep breaths, Hey Hey...
We weren't actually discussing terrorism here; just the story of a reformed murderer on death row. But since you mention it...
That's a very sad story. But unfortunately, the only thing it proves is something we both accept: that terrorism is awful. (And also that it arises from people in desperate situations. In that regard, it would seem to support my suggestion that compassion (which might have made Omar's situation a little less desperate) might discourage acts of terrorism.)
To answer your suggestion: if I could spare the criminals' lives, and also dissuade them from committing any more crimes, then I probably would have them live in my house. But don't dwell unnecessarily on that; it's only my personal choice, and I think a rational exposition of the issues around this topic is of more value than debating my personal views.
~~~~
If one believes that punishing criminals is a good
in itself (i.e. apart from its consequences), then one supports the idea of
retributive justice. This idea emphasises payback over restitution: a criminal would be hanged even if it did no good to the victim, because it would be the "right thing to do".
Alternatively, one might support punishing criminals as a deterrent to other potential criminals (something you've hinted at supporting elsewhere) or as a means to rehabilitation or greater security. In this case you'd be a supporter of
utilitarian justice.
Alternatively, one might not support punishment at all. If you believe there's no free will, for instance, that might undermine the idea that someone deserves to be punished. Or if you believe that less good would come from punishment than from other measures (e.g. just rehabilitation), then you might choose those other measures instead. Probably the perpetrator would experience some discomfort regardless, so the process wouldn't be strictly punishment-free...
If you want to discuss these issues then maybe read this:
http://en.wikipedia.org/wiki/Justice#Theor...ibutive_justiceIt's quite a short section.